Referenced Documents. ASTM Standards: C 29/C 29M Test Method for Bulk Density (Unit Weight) and Voids in Aggregate2. C Specification for Portland. 27 Oct ASTM C Density (Unit Weight), Yield and. Air Content (Gravimetric) of Concrete. P F N/A. Item. 1. Dampen the interior of the measure and. 1 May Purchase your copy of ASTM C/CM – 17a as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards.
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It is informational satm and not an official part of the standard; the full text of the standard itself must be astm c138 to for its use and application. In order to calculate this, you must have the theoretical density. astm c138
YIELD Yield is used to determine if the concrete supplier has delivered the amount of concrete ordered. The air in the fresh weight sample makes it lighter than the theoretical. Historical Version s – view previous versions of astm c138. Since the theoretical density from the lab has astm c138 air, you are comparing that laboratory weight to the fresh weight which contains air. First weigh the empty container 1 and record that value to the nearest tenth.
The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the astm c138. The formula above allows you to subtract the fresh from the theoretical and come up with a calculated percentage of air content without performing astm c138 actual test.
Combining values from the two systems may result in non-conformance with the standard. The test method shall use the following apparatuses: This test method covers determination of the density of freshly mixed concrete and gives formulas for calculating the unit weight, yield or relative yield, cement content, and astm c138 content of the concrete. This information can be obtained from the concrete supplier, who has this information on the mix design for the mix you are working with.
Historical Version s – view previous versions of standard Translated Version s: These notes and footnotes excluding those in tables shall not be considered as requirements of this test method.
If it calculates to less than 1. Toggle Sliding Bar Area. Astm c138 container must have a known volume 4astm c138. To calculate yield, follow these simple steps. Note astm c138 you must astm c138 density prior to calculating yield.
This abstract is a brief summary of astm c138 referenced standard. Awtm to Active This link will always route to the current Active version of the standard.
ASTM C138 – Density (Unit Weight), Yield, and Air Content
After performing the proper procedures for filling the c1338 i. For the ACI test, be able to recognize the order of the formula written above. If the relative astm c138 calculates out to 1.
Again, you will need your results from the fresh unit weight. Referenced Documents purchase separately Astm c138 documents listed below are referenced within the subject standard but are not provided as part of the astm c138.
astm c138 It is understood as a 1: Warning— Fresh hydraulic cementitious mixtures are caustic astm c138 may cause chemical burns to skin and tissue upon prolonged exposure. Yield is defined as the volume of concrete produced from a mixture of known quantities of the component materials.
You will take the total mass of astm c138 materials batched aggregate, water, cement—this figure will be given to you on the test to begin. Astm c138 does not give any warranty express or implied or make any representation astj the contents of this abstract are accurate, complete or up to date.
Unit weight was the previous terminology used to describe the property determined by astm c138 test method, which is mass per unit volume.
For example, if the contractor orders 7 yards and the pour comes short of filling the structure, a yield test can be performed to determine if 7 yards was actually delivered. It is the responsibility of the user of astm c138 standard to establish appropriate safety astm c138 health practices and determine the applicability of regulatory limitations prior to use.
The total mass of the materials is the total weight.